Cardiac pacing using adjustable atrio-ventricular delays
AssigneeCardiac Pacemakers, Inc.
InventorsJiang Ding, Yinghong Yu, Andrew P. Kramer, Julio Spinelli
Life of this patent
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Abstract
A pacing system for providing optimal hemodynamic cardiac function for parameters such as contractility (peak left ventricle pressure change during systole or LV+dp/dt), or stroke volume (aortic pulse pressure) using system for calculating atrio-ventricular delays for optimal timing of a ventricular pacing pulse. The system providing an option for near optimal pacing of multiple hemodynamic parameters. The system deriving the proper timing using electrical or mechanical events having a predictable relationship with an optimal ventricular pacing timing signal.
Claims18
An apparatus, comprising:
- a programmable pulse generator;
- and
- at least one sensor, coupled to the programmable pulse generator, to sense a plurality of cardiac events,
- wherein the programmable pulse generator is adapted to:
- measure a first time interval between a first cardiac event and a second cardiac event that has an approximately constant timing relationship with respect to the first cardiac event and a predictable timing relationship to a delivery of pacing timed for maximizing peak positive left ventricular pressure change during systole (LV+dp/dt);
- determine a delay time interval referenced to the first cardiac event using a predetermined mapping relationship of the first time interval to an approximately optimal delay time interval for maximizing LV+dp/dt;
- and
- transmit pacing pulses using the delay time interval.
Dependencies are inferred from the claim text.